JavaScript MCQ Quiz | Set – 03Piyush PatilJanuary 9, 2024JavaScript Quiz, HTML & CSS, JavaScript Games, Quizzes Share your love 142 Created on May 17, 2023 By Piyush PatilJavaScript Quiz | Set - 03 1 / 15What is the output of the following code snippet?console.log(typeof null); "null" "undefined" "object" "string" 2 / 15What is the result of the following expression?"2" + 2 4 "4" 22 "22" 3 / 15 Which of the following methods can be used to merge two or more arrays in JavaScript? concat() join() slice() map() 4 / 15What is the purpose of the bind() method in JavaScript? To remove an element from an array To attach an event handler to an element To create a new function with a specific `this` value To sort an array in ascending order 5 / 15 What does the `NaN` property in JavaScript stand for? Not a Number Null and Negative Negative and Null Not a Null 6 / 15What is the output of the following code snippet?console.log(0.1 + 0.2 === 0.3); true false null none of the above 7 / 15What is the purpose of the call() method in JavaScript? To invoke a function and provide a new value for `this` To convert a string to uppercase To create a new array from an existing array To remove an element from an array 8 / 15What does the localStorage object in JavaScript allow you to do? Store data in the user's browser that persists across sessions Manipulate the DOM structure of a web page Send HTTP requests to a server Validate user input in a form 9 / 15What does the event.stopPropagation() method do in JavaScript? Prevents the default behavior of an event Stops the event from bubbling up to parent elements Adds a new event listener to an element Clears all event listeners attached to an element 10 / 15Which of the following is NOT a valid way to define a function in JavaScript? function myFunction() {} var myFunction = function() {}; const myFunction = () => {}; let myFunction() => {} 11 / 15What is the output of the following code snippet?console.log(3 > 2 > 1); true false 12 / 15What is the purpose of the reduce() method in JavaScript? To execute a function once for each array element To remove an element from an array To merge two or more arrays into a single array To reduce an array to a single value 13 / 15What is the output of the following code snippet?console.log(typeof []); "array" "object" "undefined" "null" 14 / 15Which of the following methods can be used to remove the last element from an array in JavaScript? pop() push() shift() unshift() 15 / 15What is the purpose of the Promise object in JavaScript? To handle asynchronous operations and provide a way to handle success or failure To manipulate strings and perform text operations To define a custom error type in JavaScript To perform mathematical calculations Your score isThe average score is 52% LinkedIn Facebook Twitter VKontakte 0% Restart quiz Tags# games using javascript# HTML Quiz# javascript games# Web Development Quiz Share your love Previous Post 30+ CSS 3D Examples Next Post Jai Shree Ram 3D Card using HTML and CSS
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